Rotary table for sound-record disks.



T C WHIHNG.

ROTARY TABLE FOR ammo RECORD DISKS APPLlCATlON FILED JULY 5, 1916- l 3,36 9%. meme! 26, 12:2.

' To all whom it may camera:

s r an" urinal,

' HEQ CLIFFORD WHITING, 0F PHILADELPHIA, PENNSYLVANIA.

RUT ARY TABLE FOR SOUND-REGORID DISKS.

asagna.

Be it known that I, Tnno Cnn ronn Wm Inc, a citizen of the United States, residing at Philadelphia, in the State of Pennsylvania, have invented a certain new and useful Improvement in Rotary Tables for Sound- Record Disks, whereof the following is a specification, reference being had to the accompanying drawing.

My invention relates to tables formed of pressed sheet metal, having means adapted to detachably engage a motor shaft, and

means to detachably engage and turn a sound record disk, inconcentric relationwith said table. As ordinarily constructed,

axial'hub riveted therein, without any reinforcement at the junction thereof, and havmg a sheet of felt upon its upper surface.

In such construction thedisk is apt to be distorted from normal relation to the axis of'the hub by pressure upon the margin of the disk incident to the manual operation of fitting the sound records upon the table,

and, although it has been proposed to pre- 1 vent such distortion by making the disks of metal much heavier than is; otherwise required for the normal function of the table, such increase in weight not only largely increases the cost of construction of such-tables but is objectionable in that it necessitates an added load upon the motor. Moreover, such ordinary tables do not include any means for protecting the outer edge of the felt thereon, and the latter is apt to be loosened and turned up by the impingement of the fingers of the operator. Therefore, it is the object of my invention to provide a table including such reinforcing means at the central portion of its disk, that'thelat- 7 ter may be made of thinnermetal than heresaid disk with a raised rim serving tofor'e', with consequent economy in the manufacture of such'tables, and also to provide as a. shield for the outer edge of the felt or other 'resilie t fabric cover thereon, so as to'pre- I vent isplacement of saidedge.

My invention includes the various novel features of construction and arrangement hereinafter more definitely specified and claimed.

In said drawing; Figure Tie a fragmentary plan view of a table embodying m'y'invention, the resilient fabric cover thereof being partly omitted;

Fig. 11 is a fragmentary sectional view of said table, taken on the line 11, II in Fig. I, showing the fabric cover in position.

Fig. III is a vertical sectional view of the hub element of my invention before its insertion and deformation in the table to rigidly engage the latter.

In said figures; the table includes the 1 pressed sheet metal disk 1 having the circumferential bead 2 forming a rim ridge projecting from the upper face ofsaid disk at the perimeter of the latter and said bead merges into the cylindrical flange 3 extendng from the lower face of said disk and einforcin'g the periphery of said disk. Said disk is also, preferably, reinforced interme diate of its expanse, by a series of heads 5 pressed therein so as to project from the lower face thereof, and is further reinforced by being countersunk at .6, forming a recess 7; said ribs 5 and countersunk "portion 6 being concentric-with said flange? The circular series-oftabs 8 are projected from the same face of said disk as said flange 3, by stamping means thrust through the Open ings Q at the bottom of said recess 7. The fie'inforcing plate 10 is rigidly held in coneentric position on said disk 1- by said tabs 8, which are clenched over the edges of said plate 10 as shown in Fig. II. The axial hub 12 has the internal conical shaft bearin 13 for detachable engagement with theshaft of a motor by which the table may be! rotated, and said hub has the external shoulder 15' bearing upon said plate 10, and also has the tubular shank 16 which extends through said plate and disk and has theannular is fitted upon the face of said disk 1 with its perimeter adjacent said ridge 2 and pro- 1 and merging into said bead, and a circular form the shaft bearing 13 in the hub 12 be fore assembling the latter in the table, and, in order to prevent distortion of the upper edge of the shaft bearing 13 in said hub by the operation of rivetin the outer edge of the'shank 16 to form sald flange 17 1 prefer to'ema oy a riveting tool 25which, as

ind icated in Fig. III, has a cylindrical axial opening 26 with a cutting edge so that the shank .16 of said hub 12 iscut and held in circumferential relation with the disk 1, by said tool edge, while the marginal portion of said shank is spread outwardly by the inclined surface 27 of said tool to form'said flange 17.

I prefer to make said table disk of sheet steel and to provide the same with a platin of other metal, for instance nickel, whic may be polished where it projects from beneath the textile cover 19. It may be observed with reference to Fig. II that the outer edge of said cover 19 is in spaced relation with the ridge formed by said circumferential bead 2 so as to expose all of the surface of said head which is thus polished. However, the ordinary pressing operation whereby such a head as indicated at 2 may be formed stretches the convex sur-' face of the metal and leaves it so porous that it has a rough appearance when subsequently plated and polished. Therefore, I prefer to t irnish, or otherwise condense, the

" convex surface of said head 2, so as to close the pores opened by the bending operation and render it smooth before platin%and polappear' ishing it, and thus avoid the roug ance aforesaid, and stiffen said disk.

I do not desire to limit myself to the precise details of-construction and arrangement herein set forth, as it is obvious that various modifications may be made therein Without departing from the essential features of my invention as defined in the appended claims.

I claim T 1; Ina rotary table adapted to support and turn a sound record; the combination with a pressed sheet metal disk having a circumferential bead forming a burnished rim ridge projecting from the upper face 'of said disk, a peripheral cylindrical flange extending from thelower face of said disk series of tabs pressed from said disk, and projected. from the same face ofsaid shank extending through said plate and disk, and an annular peri heral flange pressed into engagement wit the "face of,

said disk, in opposition to said shoulder;

a cover of resilient textile material fitted upon the face of said disk with its perimeter shielded by said ridge, and ha an axial opening in registry with the s aft bearing in said hub; and adhesive means securing said cover upon said disk.

2. In a rotary table adapted to support and turn a sound record; the combination with a pressed sheet metal disk having a circular series of tabs pressed from said disk; of a reinforcing plate rigidly held in concentric position on said disk by said tabs; and an axial-hub having an internal shaft bearing, an external shoulder bearing upon said plate, a tubular shank extending through said plate and disk, and an annular peripheral flange pressed into engagement with the faceof said disk, in opposition to said. shoulder.-

3. In a rotary table adapted to support and turn a sound record; the combination with a pressed sheet metal disk having tabs; of a reinforcing plate rigidly held in concentric position on said disk by said tabs; and an axial hub having an internal shaft bearing, an external shoulder bearing upon said plate, a tubular shank extending through said plate and disk, and an annular flange pressed into engagement with .the face of said disk, in opposition to said shoulder.

4:. In a rotary table adapted to support and turn a sound record; thecornbination with a sheet metal disk having an axial o ening f of a plane reinforcing plate in c ncentric relation with said disk and having a'n axial opening; and a hub extending through said disk and plate, having means securing them in rigid relation.-

5. In a rotary table adapted to support and turn a sound record; the combination With a sheet metal disk having an axial hub; of a plane reinforcin plate in concentric relation with said dis but of smaller of said hub, rigidly connecting said 125 and plate.

. 7.- Ink a. rctary-table adepted 116 support In .testiinony wherecf, I have hefeunto and turn a sound record;'the combination signed my name at Philadelphia, Pennsylwith a sheet metal disk having an axiei Vania, this fourteenth day of June, 1916.

hub; of a reinforcing plate in concentric re THEO CLIFFORD 'WHITING; 5 lation with said disk, but 0f smaller diam- -Witnesse's:

eter; and-means, independent of, said hub,; .7 ARTHURE. PAIGE,

rigidly connecting said andplate. ANNA'ISBAELVITZ." 

